std_logic_vector makes it easy to compare and assign whole buses, which dramatically simplifies the work necessary to specify combinational logic.
For example, if `value` is a 4-bit bus, we could compare it with a constant:
value = "1101"
Similarly, if `output` is an 8-bit bus, we could set all the bits at once with
output <= "0001111"
Complete the architecture below to display the value of S using the digits 0 and 1 on a 7-segment display. The output should be a vector of bits corresponding to the LED segments, in the order "abcdefg".
entity sevenseg01 is
S : in std_logic;
segments : out std_logic_vector(6 downto 0)
architecture synth of sevenseg01 is
segments <= "0000000";